After the eye drops appear edema, consider the drug allergic reaction, should stop using drugs, local cold compresses, and give anti-allergy treatment. In the eye after the use of eye drops eye edema, usually related to allergic reactions, patients may also be accompanied by conjunctival congestion, eye itching and other symptoms, this time you need to immediately stop the use of eye drops, to avoid further aggravation of allergic symptoms. You can apply cold compresses with ice towels to promote the edema to subside, and then you can go to the ophthalmology department of the hospital for examination. Bring the eye drops with you to help the doctor determine the allergens. If the allergy symptoms are more serious, you can order anti-allergy eye drops under the guidance of the doctor, such as olopatadine hydrochloride eye drops, azelastine hydrochloride eye drops and so on.